85
■
Mode Switch
RS485 interface is used to communicate between this unit and the PS·Data compatible system device. In this case, it is neces-
sary to terminate both devices on both ends of the RS485 connection.
The settings of the mode switch will be different depending on whether this unit is used as a receiver or a controller.
When an RS 485 camera is connected to this unit, it is necessary to terminate both devices on both ends of the connection.
• When connecting this unit with the system controller and
this is installed at the end of the PS·Data connection
PS·Data termination switch 1: ON
• When connecting a system device and this unit is installed
at the end of the PS·Data connection
PS·Data terminating switch 2: ON
• When connecting RS485 cameras
Set the termination switch of the connected RS485 (CAMERA)
port to ON.
Connected to the RS485 (CAMERA) port 1: Set the RS485 (1)
termination switch to ON.
Connected to the RS485 (CAMERA) port 2: Set the RS485 (2)
termination switch to ON.
• For 2-wire communication
Connected to the RS485 (CAMERA) port 1: Set the switch No.2 and No.3 to ON.
Connected to the RS485 (CAMERA) port 2: Set the switch No.5 and No.6 to ON.
• For 4-wire communication
Connected to the RS485 (CAMERA) port 1: Set the switch No.2 and No.3 to OFF.
Connected to the RS485 (CAMERA) port 2: Set the switch No.5 and No.6 to OFF.
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RS485 Port
6 7 8
1 2 3 4 5
ON
RS485 (1) terminating switch
RS485 (1) 2/4-wire changeover
RS485 (2) terminating switch
RS485 (2) 2/4-wire changeover
PS•Data terminating switch 1
PS•Data terminating switch 2
RB
RA
TB
TA
DATA
G
N
D
G
N
D
Output Input
RA
RB
TA
TB
Internal block diagram
